What causes the Mirena string to disappear?

The Mirena string may appear to disappear due to a few reasons, such as the string being pulled up into the cervical canal or the uterus, making it less visible or undetectable. In some cases, the string can also break or fray. If you cannot locate the string, it is important to consult a healthcare provider to ensure the IUD is still in place and functioning properly. Regular checks and follow-ups are advisable to monitor the IUD's position.